Improvement in operating throttle-valves



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Patented Sep. 5, 1871.

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FAN wia .Avfglr UNITED STATES WILLIAM BELLIS, OF INDIANAPOLIS, INDIANA.

IMPROVEMENT IN OPERATING THROTTLE-VALVES.

Specification forming part of Letters Patent No. 118,676, datedSeptember 5, i871.

To all whom it may concern:

Be it known that I, WILLIAM BELLIS, of Indianapolis, Marion county,Indiana, have invented a new and useful Improvement in Stop orTl'1rottle-Valves,of which the following is a speciication:

It is well known that many serious and not a few fatal accidents occurin establishments whose machinery is impelled by steam which might beprevented or lessened did some ready and accessible means exist i'orsuddenly stopping the engine.

Thepresent invention relates to a device whereby a person on any door ofa factory or workshop is enabled to close the throttle quickly in caseof emergency, and thus to stop the machinery.

Figure l is a vertical section of a throttle or valve and itsappurtenances, embodying my improvement. Fig. 2 shows my apparatusapplied to a house of several floors.

rllhe steam from the boiler, conveyed through `the pipe A, enters achamber, C, which, when the valve is lifted, as shown, communicates withthe interior ofthe globe or shell B through apertures c and c', of whichthe upper aperture c is so much in excess as to make hthe valve, whenliberated from the closin g-screw, seliopening by the pressure of thesteam. Of corresponding size and relative distance with the openings c care two disks, D D, whose connecting-ribs or bars E, being prolongedbelow the lower and smaller disk D', serve to guide the valve to itsseats, and also enable the engineer, when his valve has become nnequallyworn, to grind the same in its seats. The hand-screwF is not fastened tothe valve-stein G, but the point of the screw presses upon a piece ofsteel, H, let into the head I ofthe valve-stein. IThe head I has a slot,i, to receive the end of a weighted lever, J, which is fulcrumed at K.The weight L is adjustable nearer to or further from the fulcrum, to aposition where its gravity will just serve to overcome the friction ofthe stuiiing box M, through which the valve-stem passes. The lever J hasat or near its outer end an eye, j, or other provision for theattachment of a cord, N, which, being carried upward and downwardthrough lioors of the building, may pass over a pulley or pulleys in theupper story thereof, and, being carried down in some convenient andconspicuous place, become available for instantly closing the throttle,and thus arresting the motion of the machinery from any floor ofthebuilding.

My closing devices, although preferably used in conjunction with abalance-valve such as I have described, may obviouslybe made availablewith other forms of valve.

I claim as new and of my invention- A throttle-valve opened by thesteam-pressure, and capable of being closed either by screw F or by thesupplementary closing device J K L N, in the manner and for the purposestated.

In testimony of which invention I hereunto set my hand.

VILLIAM BELLIS.

Witnesses:

GEO. H. KNIGHT,v L. SCHMIDT.

